EP 2805086 B1 20160817 - ABEYANCE SEAL FOR HIGH TEMPERATURE, HIGH PRESSURE APPLICATIONS
Title (en)
ABEYANCE SEAL FOR HIGH TEMPERATURE, HIGH PRESSURE APPLICATIONS
Title (de)
RUHEDICHTUNG FÜR HOCHEMPERATUR- UND HOCHDRUCKANWENDUNGEN
Title (fr)
JOINT DE SECOURS POUR APPLICATIONS À HAUTE PRESSION ET HAUTE TEMPÉRATURE
Publication
Application
Priority
- US 201261588346 P 20120119
- US 2013021907 W 20130117
Abstract (en)
[origin: WO2013154644A2] An abeyance seal is provided to prevent leakage to environment past a primary mechanical sea. The abeyance seal includes a polymer actuation ring, which is the first line of sealing actuation and defines a flexible sealing lip normally spaced from the shaft. When subjected to leakage, this element collapses against the shaft or shaft sleeve and forms an initial sealing. Actuation of this element occurs at lower leakage flows due to high velocity steam, two phase flow, or gas. Secondarily, a metal sealing/anti-extrusion ring is provided to provide a second seal during leakage. The polymer ring provides the initial sealing function during leakage at low differential pressure (e.g. less than 10 psid), and once the polymer ring seals to the shaft or shaft sleeve, increased sealed pressure loads the polymer ring against the metal sealing/anti-extrusion ring causing it to deform so that the inside diameter of the metal ring comes into contact with the shaft or shaft sleeve to form a second seal. Seal actuation is not dependent on temperature but on actual leakage flow. If no steam leakage is present or there is very low steam leakage, actuation will not take place unless liquid leakage flow is significantly higher.
IPC 8 full level
F16J 15/00 (2006.01); F16J 15/16 (2006.01); F16J 15/32 (2006.01)
CPC (source: EP US)
F16J 15/164 (2013.01 - US); F16J 15/322 (2013.01 - EP US); F16J 15/3228 (2013.01 - EP US); Y02E 30/30 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013154644 A2 20131017; WO 2013154644 A3 20131205; CA 2861913 A1 20131017; CA 2861913 C 20160308; EP 2805086 A2 20141126; EP 2805086 B1 20160817; ES 2602907 T3 20170222; KR 101601580 B1 20160308; KR 20140146581 A 20141226; MX 2014008641 A 20150114; MX 343428 B 20161104; TW 201340118 A 20131001; TW I514420 B 20151221; US 2014027984 A1 20140130; US 8955850 B2 20150217
DOCDB simple family (application)
US 2013021907 W 20130117; CA 2861913 A 20130117; EP 13747716 A 20130117; ES 13747716 T 20130117; KR 20147023082 A 20130117; MX 2014008641 A 20130117; TW 102101957 A 20130118; US 201313743924 A 20130117